Improvement in rotary pumps



. I Il Jn NA PETERS, FHOTO-LITHOGRAPNER. WASH N mf UNITED STATES PATENTOFFICE.

IMPROVEMENT IN ROTARY PUMPS.

Specification forming part of Letters Patent No. 35,452, dated June 3,1862.

To all whom, it may concern.:

Be it known that I, FREDERIC KETTLER, of

. Milwaukee, State of Wisconsin, have invented `to the accompanyingdrawings and the letters of reference marked thereon.

The purpose of my invention is to construct a perfect airtight anddurable pump.

Fignrel is a prole view of this pump,showl ing all 'the different partsof it. Fig. 2 is a top view of the same.

Axle A is fastened in plate B. This plate B has sections cut out fromeach side, in which pistons C move. These pistons C are provided withcogrollers D, which are placed between pistons C and plate B. Thepurpose of said cog-rollers is to ease the motion of piston C. AbutmentsE of pistons C are constructed of brass or other rsuitable material andfastened to the pistons C by means of hinges. Plates E E partially coverthe pistons G C and forward cog-rollers,-D D.

F is an elevation in which a spring, F, presses 'firmly against plate Bto prevent the escape of water.

G is a volute spring around axle A, forming a packing thereon.

H is the outer cylinder of this pump, and I the lid of this pump,provided with a box for axle A. l

R is the induction-pipe, and L the eductionpipe. This latter is providedwith the small hole -m,.which lets out all the water standing above thatpoint, and so prevents its freezing. This hole is provided with aspring, which, through the pressure of the water, in case the pump is toth row the stream a great distance, closes it.

What I claim as my invention, and desire to secure by Letters Patent,is-

.1. The combination of cogrollers G, with pistons C,and plate B, asshown and described.

2. The abutmeuts E and plates E', and pistons C, as combined andarranged with the whole apparatus.

3. The elevation 11?',in combination with the spring F, arranged andcombined with the apparatus, as described;

4. The volute spring G, arranged in the manner and for the purposespeciiied, in combination with the apparatus, forming a packing aroundthe axle A.

5. Valve m, in combination with the appa- 'atus, in the manner and forthe purpose set orth.

FREDERIC KETTLER.

Witnesses:

LEWIS E. RAUTEREEEG, J oIIN S. HoLLINGsHEAD.

